光伏并网系统中的电压控制策略研究与优化设计

Research and Optimization Design of Voltage Control Strategies in Photovoltaic Grid Connected Systems

光伏发电是新能源发电的主要形式,具有节能环保、运用灵活的特点。随着绿色发展以及双碳目标的提出,我国光伏产业也迎来了前所未有的机遇。光伏发电是光能转化为电能的过程,但光辐射本身具有一定的波动性和随机性,因此在电能转化中也会有一定的波动性和随机性。此外,随着光伏发电的入网,联络线之间的有功传输也会有所减少,进而引发节点电压的偏移,产生明显的电压波动。为有效解决该问题,从光伏并网电压影响的机理出发,对光伏并网的接入方式进行探讨,针对光伏入网特点分别从加强配电网规划管控、加强光伏并网点电压管理、强化光伏并网技术水平以及加强光伏并网运行管理等层面提出优化,期望能够在减少光伏并网电压影响的同时提升电能质量,进一步发挥其绿色节能的优势。

Photovoltaic power generation is the main form of new energy power generation,which has the characteristics of energy saving,environmental protection and flexible application.With the green development and the proposal of double carbon target,China’s photovoltaic industry has also ushered in unprecedented opportunities.The process of photovoltaic power generation is the process of converting light energy into electric energy,which is characterized by fluctuation and randomness.With the photovoltaic grid connection,the active power transmission between lines will be reduced,which will lead to the shift of node voltage,and the closer to the end of the line,the more obvious the voltage fluctuation.In order to effectively solve this problem,this paper discusses the access mode of photovoltaic grid-connected from the mechanism of photovoltaic grid-connected voltage.According to the characteristics of photovoltaic grid-connected,it puts forward optimization from the aspects of strengthening the planning and control of distribution network,strengthening the voltage management of photovoltaic grid-connected points,strengthening the technical level of photovoltaic grid-connected and strengthening the operation management of photovoltaic grid-connected,hoping to improve the power quality while reducing the impact of photovoltaic grid-connected voltage,and further give play to its advantages of green energy saving.